Where to find Duosion in Sun, Moon, Ultra Sun & Ultra Moon

Only in Sun & Moon
Island Scan: Route 16 (100%)

Duosion also appears in

How to get Duosion in Sun, Moon, Ultra Sun & Ultra Moon

Its base catch rate is 100 out of 255 (higher is easier); the catch rate calculator works out your odds with each ball. For the look, the best colour match is Friend Ball or Nest Ball.

Duosion in every game · Pokémon Sun, Moon, Ultra Sun & Ultra Moon interactive map (Alola)